A body moves a distance of $10 \,m$ along a straight line under the action of a force of $5 \,N$. If the work done is $25\, joules$, the angle which the force makes with the direction of motion of the body is.....$^o$
A body moves a distance of $10 \,m$ along a straight line under the action of a force of $5 \,N$. If the work done is $25\, joules$, the angle which the force makes with the direction of motion of the body is.....$^o$
$0$
$30$
$60$
$90$
A body moves a distance of $10 \,m$ along a straight line under the action of a force of $5 \,N$. If the work done is $25\, joules$, the angle which the force makes with the direction of motion of the body is.....$^o$
$W = Fs\cos \theta $
==> $\cos \theta = \frac{W}{{Fs}} = \frac{{25}}{{50}} = \frac{1}{2}$
==> $\theta = 60^\circ $
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